MAUI GraphicsView canvas save to file

Question

Hello;

I have a problem that I cannot solve;

I want to save the image created in Maui GraphicsView.

But I failed. Do you have any knowledge about this?

Thanks.

Answer 1

Hello,

If you want to save the graphical content, you can use File system helpers and GraphicsView.CaptureAsync() method

Firstly, if you have a GraphicsView like following code.

<GraphicsView
      x:Name="myGraphicsView"
                Drawable="{StaticResource drawable}"
                HeightRequest="300"
                WidthRequest="400" />

Then, you can save it from backgroud code. 1. get the IScreenshotResult by myGraphicsView.CaptureAsync(), 2. Create an output file, copy the graphics to this output file by await screenshotResult.CopyToAsync(outputStream);.

IScreenshotResult screenshotResult= await myGraphicsView.CaptureAsync();

if (screenshotResult!=null)
{
    // Create an output filename
     targetFile = Path.Combine(FileSystem.Current.AppDataDirectory, "test2.png");         
    // Copy the file to the AppDataDirectory
    using FileStream outputStream = File.Create(targetFile);
    if(File.Exists(targetFile))
    {
        await screenshotResult.CopyToAsync(outputStream);
    }  
}

Best Regards,

Leon Lu

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Answer 2

Thanks. Good solution.